Windshield wiper



FIG. 1 is a front, top and right side perspective view of a windshield wiper showing my new design;

FIGS. 2 and 3 are respectively front and rear elevational views thereof;

FIGS. 4 and 5 are respectively left and right side elevational views thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view. 

The ornamental design for a windshield wiper, as shown and described. 